Initial stress anisotropic cemented soil and preparation method thereof

The invention discloses initial stress anisotropy cemented soil and a preparation method thereof, the cemented soil is composed of sand gravel, powder clay and gelling stone, the mass percentage of the gelling stone is 4-6%, the total mass percentage of gravel and the powder clay is 94-96%, and the mass of the gravel is 13-50% of the total mass of the gravel and the powder clay. The preparation method comprises the following steps: (1) uniformly mixing and stirring air-dried sand gravel, powder clay and coagulated stone, adding water, and uniformly stirring to obtain a mixture; (2) performing sample preparation on the mixture through a mold to obtain a soil sample; and (3) applying a vertical load right above the soil sample before form removal so as to provide anisotropic stress for maintenance, slowly injecting water into the soil sample at the same time, and cementing the soil material together through the cementing effect of the coagulated stone and the water. According to the method disclosed by the inve